Ron, read the page that I referenced earlier. You were toying with the FOCUS pin in the N3 connector. There is another pin that trips the shutter. Here's what the pinout of the connector looks like:
The N3 connector pin-out (looking at the N3 connector on the camera):
Top - ground Left - shutter Right - focus
What this pin-out means is that if you short the right and the top pin, the camera will focus (in AF mode). If you short the left and top pin, the shutter will release.
Cheers,
Dave M